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Cost Effective PEM Electrolysis: The Quest to Achieve Superior Efficiencies with Reduced Investment

Friedrich, Kaspar Andreas und Stiber, Svenja und Lettenmeier, Philipp und Wang, Li und Ansar, Syed Asif und Gago, Aldo (2018) Cost Effective PEM Electrolysis: The Quest to Achieve Superior Efficiencies with Reduced Investment. Seminar of the Chemistry Department, University of Alberta, 2018-05-22, Calgary, Kanada.

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Kurzfassung

Hydrogen is expected to play an important role as a crosslinking technology between power generation on one hand and transport and industry on the other hand. It can directly replace fossil fuels in transport and industry when produced by water electrolysis renewable energies such as solar or wind, which are converted with low efficiencies. The relevant technologies are either the mature alkaline electrolysis or the newer proton exchange membrane (PEM) water electrolysis. For PEM electrolysis in particular, key components that determine the stack cost are the titanium-based contact elements, such as the bipolar plates (BPP) and the current collectors (CC), and the high iridium loading of electrocatalyst for the OER in state of art membrane electrode assemblies (MEA). However, the cost structure depends on the specific design of the electrolyser. This presentation will discuss strategies for cost reduction by synthesizing novel electrocatalyst with the aim of lowering the high Ir loading. Our concept can be applied to supported and alloy electrocatalysts. The supports need to be highly stable and exhibit sufficient electronic conductivity. The enhancement of activity achieved with improved electrocatalyst reaches a factor of about 15 with respect to the best commercially available electrocatalyst. Additionally, the cost reduction achieved by a titanium coating for stainless steel BPPs or CCs for PEM electrolysis will be discussed. We use vacuum plasma spraying (VPS) to coat either dense coatings for corrosion protection of stainless steel components or build up titanium diffusion layers with defined porosity as contact elements for the MEA. The conductivity of the titanium coating can be improved by well-known Pt or Au additions; however, we have also developed promising non-noble conductivity enhancement elements. Furthermore, the VPS coating and production procedure is adaptable to large-scale industrial production.

elib-URL des Eintrags:https://elib.dlr.de/125605/
Dokumentart:Konferenzbeitrag (Vortrag)
Titel:Cost Effective PEM Electrolysis: The Quest to Achieve Superior Efficiencies with Reduced Investment
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Friedrich, Kaspar AndreasAndreas.Friedrich (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Stiber, SvenjaSvenja.Stiber (at) dlr.dehttps://orcid.org/0000-0002-8537-6589NICHT SPEZIFIZIERT
Lettenmeier, PhilippPhilipp.Lettenmeier (at) dlr.dehttps://orcid.org/0000-0002-2822-8440NICHT SPEZIFIZIERT
Wang, LiLi.Wang (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Ansar, Syed AsifSyed-Asif.Ansar (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Gago, AldoAldo.Gago (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum:22 Mai 2018
Referierte Publikation:Nein
Open Access:Nein
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Status:veröffentlicht
Stichwörter:DLR electrochemical research activity, electrolysis, cost reduction
Veranstaltungstitel:Seminar of the Chemistry Department, University of Alberta
Veranstaltungsort:Calgary, Kanada
Veranstaltungsart:Andere
Veranstaltungsdatum:22 Mai 2018
Veranstalter :Chemistry Department, University of Alberta
HGF - Forschungsbereich:Energie
HGF - Programm:Speicher und vernetzte Infrastrukturen
HGF - Programmthema:Elektrolyse und Wasserstoff
DLR - Schwerpunkt:Energie
DLR - Forschungsgebiet:E SP - Energiespeicher
DLR - Teilgebiet (Projekt, Vorhaben):E - Elektrochemische Prozesse (Elektrolyse) (alt)
Standort: Stuttgart
Institute & Einrichtungen:Institut für Technische Thermodynamik > Elektrochemische Energietechnik
Hinterlegt von: Friedrich, Prof.Dr. Kaspar Andreas
Hinterlegt am:10 Jan 2019 15:21
Letzte Änderung:24 Apr 2024 20:29

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